Constant-force mechanism and constant-force spring support hanger

Abstract

The utility model discloses a constant force mechanism and a constant force spring support hanger, which belong to the technical field of support hangers, and comprise a cylinder body, a front end cover, a rear end cover, a cylinder shell, a spring and a spring, the inner guide piece is located in the cylinder body and comprises a limiting plate and four supporting rods; the plurality of outer guide rods are positioned in the barrel shell and are arranged between the front end cover and the rear end cover; the pressing plate is in sliding connection with the multiple outer guide rods; the elastic structure is supported between the pressing plate and the front end cover and movably arranged outside the inner guiding piece in a sleeving mode. One end of the pulling plate penetrates through the movable channel; one end of the pull rod is connected with the pressing plate, and the other end penetrates through the inner guide hole and is hinged with the pull plate; through limiting and guiding at the two ends, the pull rod can stably move in the axial direction, the problem of deflection shaking is solved, the constancy degree is improved, and the actual using effect is improved; in addition, the whole structure of the mechanism is high in compactness, good in stability and convenient to install and arrange, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of supports and hangers, and in particular to a constant force mechanism and a constant force spring support and hanger. Background Art

[0002] As an important equipment for pipeline support, constant force spring supports and hangers are widely used in steam and water pipelines in thermal power plants, boiler bodies in power stations, various pipelines in the petroleum and chemical industries, and have a history of standardized production in China for decades. The national standard constant force spring supports and hangers are designed based on the principle of moment balance. Although the direction of the spring axis will change slightly during operation, and the end of the spring bearing hanger will have a certain horizontal swing during operation, it still has a great advantage in cost compared with foreign four-link constant force spring supports and hangers and main and auxiliary spring constant force supports and hangers.

[0003] In order to prevent the pull rod from deflecting to one side and increasing the friction between the spring, pressure plate and cylinder wall, the constant force mechanism in the traditional constant force spring support and hanger has been structurally optimized. By adding a pull plate, the pull rod can reciprocate along the axial direction, avoiding jamming.

[0004] However, the above-mentioned constant force mechanism has poor structural stability and low limiting and guiding effect on the pull rod, which causes the pull rod to deflect and shake during movement, thereby reducing the stability and resulting in poor actual use effect. Utility Model Content

[0005] The utility model aims to provide a constant force mechanism and a constant force spring support hanger, which solves the technical problem that the constant force mechanism in the prior art has poor structural stability, resulting in the pull rod being prone to deflection and shaking.

[0006] In a first aspect, the utility model discloses a constant force mechanism, comprising:

[0007] Cylinder, comprising:

[0008] The front cover has a movable channel.

[0009] Rear end cover,

[0010] A cylinder shell, disposed between the front end cover and the rear end cover;

[0011] The inner guide member is located in the cylinder and comprises:

[0012] The limit plate has an inner guide hole.

[0013] Four support rods are arranged in a rectangular shape and are disposed between the limit plate and the front end cover;

[0014] A plurality of external guide rods are located in the cylinder shell and arranged between the front end cover and the rear end cover;

[0015] A pressure plate, slidably connected to the plurality of outer guide rods;

[0016] An elastic structure is supported between the pressing plate and the front end cover and is movably sleeved outside the inner guide member, and a plurality of the outer guide rods are evenly arranged around the elastic structure;

[0017] A pull plate, one end of which passes through the movable channel to extend into the cylinder;

[0018] A pull rod has one end connected to the pressure plate, and the other end passes through the inner guide hole and is hinged to the pull plate.

[0019] The present application performs radial limiting on the front end of the pull rod through an inner guide member, and performs indirect radial limiting on the rear end of the pull rod through a sliding connection between a pressure plate and an outer guide rod, thereby enabling the pull rod to perform stable axial movement through the limiting guides at both ends, solving the problem of deflection and jitter, thereby improving the stability and enhancing the actual use effect; in addition, the overall structure of the mechanism is highly compact and stable, easy to install and arrange, and has a prolonged service life.

[0020] On the basis of the above technical solution, the solution of this application can also be improved as follows:

[0021] Preferably, the inner guide member further comprises:

[0022] Two reinforcing plates are arranged on both sides of the limit plate, and the inner side of the reinforcing plate is connected to the two adjacent support rods, and the front end is connected to the inner side of the front end cover; adopting this solution, the force borne by the support rod is dispersed, and deformation after long-term use is avoided, which further causes the limit plate to be offset and causes the pull rod to tilt, thereby ensuring the use effect and improving the impact resistance.

[0023] Preferably, the front end cover, the rear end cover and the pressure plate are all circular and concentrically arranged;

[0024] The pressure plate is provided with a plurality of first through holes matched with the outer guide rods; the adoption of this solution improves the compactness of the structure, reduces the overall volume, facilitates installation and arrangement, and has a good actual use effect.

[0025] Preferably, a first positioning ring is provided on the front end cover, a second positioning ring is provided on the pressure plate, one end of the elastic structure is sleeved on the first positioning ring, and the other end is sleeved on the second positioning ring; by adopting this scheme, radial limiting is performed on both ends of the elastic structure, which plays a positioning role, avoids the displacement of the elastic structure during use, ensures the stability of the device, and reduces the failure rate.

[0026] Preferably, the elastic structure comprises:

[0027] The positioning ring is an integrally formed part, including

[0028] Round tube body,

[0029] A limiting ring, sleeved on the outer circumference of the circular tube;

[0030] A first spring, one end of which is in contact with the inner side of the front end cover, and the other end of which is sleeved on the circular tube and in contact with one side of the limiting ring;

[0031] The second spring has one end abutting against the inner side of the rear end cover, and the other end is sleeved on the circular tube and abutting against the other side of the limit ring; adopting this solution solves the problem of the raw material size being too long, and is convenient for production and processing; a positioning ring is also provided to facilitate the concentric docking of the two springs, thereby improving the stability of the structure.

[0032] Preferably, a second through hole matched with the pull rod is opened on the pressure plate, and the pull rod is threadedly connected with an adjusting nut after passing through the second through hole; adopting this solution, it is convenient to adjust the pressure degree of the elastic structure, and its operation is simple, easy to install and adjust, and the use effect is improved.

[0033] Preferably, it also includes:

[0034] Articulated structure, including

[0035] A U-shaped piece is threadedly connected to one end of the pull rod.

[0036] The two ends of the rotating shaft pass through the two ends of the U-shaped piece respectively.

[0037] Two rolling bearings are respectively arranged on both sides of the U-shaped member and sleeved on the rotating shaft.

[0038] A sliding bearing is sleeved on the rotating shaft and located on the inner side of the U-shaped part, and one end of the pull plate is sleeved on the sliding bearing; the adoption of this solution improves the smoothness of the constant force spring support and hanger movement, making it less likely to get stuck, and the stability is greatly improved.

[0039] In a second aspect, the utility model discloses a constant force spring support hanger, comprising: the above-mentioned constant force mechanism.

[0040] Through the above technical solution, the utility model achieves the following beneficial effects:

[0041] 1. The application uses the limit guides at both ends to enable the pull rod to stably move axially, solving the problem of deflection and shaking, thereby improving the stability and the actual use effect; in addition, the overall structure of the mechanism is highly compact and stable, easy to install and arrange, and has a longer service life;

[0042] 2. This application disperses the force borne by the support rod by setting a reinforcing plate, avoiding deformation after long-term use, which in turn causes the limit plate to deviate and the pull rod to tilt, thereby ensuring the use effect and improving the impact resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 It is a structural schematic diagram of the constant force mechanism described in a specific embodiment of the utility model;

[0045] Figure 2 for Figure 1 The schematic diagram of the structure inside the constant force mechanism shown;

[0046] Figure 3 for Figure 1 A schematic diagram of the structure of the inner guide member in the constant force mechanism shown;

[0047] Figure 4 for Figure 1 The schematic diagram of the installation of the adjusting nut in the constant force mechanism shown;

[0048] Figure 5 for Figure 1 The installation diagram of the hinge structure in the constant force mechanism shown;

[0049] Figure 6 for Figure 1 A schematic diagram of the structure of the reinforcement plate in the constant force mechanism shown;

[0050] Figure 7 for Figure 1 The structural schematic diagram of the pressure plate in the constant force mechanism shown;

[0051] Figure 8 for Figure 1 A schematic diagram of the structure of the hinge structure in the constant force mechanism shown;

[0052] Description of reference numerals:

[0053] 1. Cylinder; 2. Inner guide; 3. Outer guide rod; 4. Press plate; 5. Elastic structure; 6. Pull plate; 7. Pull rod; 8. Adjusting nut; 9. Hinge structure;

[0054] 11. front end cover; 12. rear end cover; 13. cylinder shell; 21. limit plate; 22. support rod; 23. reinforcing plate; 41. first through hole; 42. second positioning ring; 43. second through hole; 51. positioning ring; 52. first spring; 53. second spring; 91. U-shaped member; 92. rotating shaft; 93. rolling bearing; 94. sliding bearing;

[0055] 111, movable channel; 112, first positioning ring; 211, inner guide hole; 511, circular tube; 512, limiting ring. DETAILED DESCRIPTION

[0056] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0057] First of all, it should be noted that in the following description, some directional words, such as "front end" and "rear end", etc., are used to clearly explain the technical solution of the utility model. They are all analogous to the normal directions of the parts in the constant force mechanism. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the utility model.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0059] In this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0060] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0061] Example:

[0062] like Figure 1As shown, an embodiment of the present application discloses a constant force mechanism for providing elastic force in a constant force spring support hanger, and its specific structure includes: a cylinder 1, an inner guide member 2, a plurality of outer guide rods 3, a pressure plate 4, an elastic structure 5, a pull plate 6 and a pull rod 7.

[0063] The cylinder body 1 comprises: a front cover 11, a rear cover 12 and a cylinder shell 13. The front cover 11 is provided with a movable passage 111, which is preferably rectangular, but not limited thereto, and may also be circular or other shapes, without specific limitation; the cylinder shell 13 is provided between the front cover 11 and the rear cover 12.

[0064] The inner guide member 2 is located in the cylinder 1 and includes a limit plate 21 and four support rods 22. The limit plate 21 is provided with an inner guide hole 211, which is located at the center to ensure uniform force. The four support rods 22 are arranged in a rectangular shape and are arranged between the limit plate 21 and the front cover 11. They are also arranged symmetrically with the inner guide hole 211 as the axis to improve uniform force.

[0065] Preferably, the support rod 22 is welded to the inner wall of the movable channel 111 to facilitate installation and improve the connection tightness, but it is not limited to this. It can also be welded to the rear side of the front end cover 11 without specific limitation.

[0066] A plurality of outer guide rods 3 are located in the cylinder shell 13 and are arranged between the front end cover 11 and the rear end cover 12; one end of the outer guide rod 3 is welded to the front end cover 11, and the other end is bolted to the rear end cover 12, which is convenient for disassembly and assembly, and improves production and maintenance efficiency; the number of the outer guide rods 3 is preferably four, and they are evenly distributed around the axis, and can also be three, five or more, without limitation.

[0067] The pressure plate 4 is slidably connected to the plurality of outer guide rods 3 and can reciprocate along the axis of the outer guide rods 3 .

[0068] The elastic structure 5 is supported between the pressure plate 4 and the front end cover 11, and is movably mounted outside the inner guide member 2 to avoid movement interference between the two; and a plurality of outer guide rods 3 are evenly arranged around the elastic structure 5 to ensure balanced force.

[0069] One end of the pull plate 6 passes through the movable channel 111 to extend into the cylinder 1, and the other end is rotatably connected to the rotary plate frame in the constant force spring support hanger.

[0070] One end of the pull rod 7 is connected to the pressure plate 4, and the other end passes through the inner guide hole 211 and is hinged to the pull plate 6; wherein the shape and size of the inner guide hole 211 and the pull rod 7 are adapted to each other, thereby ensuring the radial limiting effect.

[0071] In the above technical solution, the inner guide member 2 radially limits the front end of the pull rod 7, and the pressure plate 4 is slidably connected to the outer guide rod 3 to indirectly radially limit the rear end of the pull rod 7. Through the limiting guides at both ends, the pull rod 7 can stably perform axial movement, which solves the problem of deflection and jitter, thereby improving the stability and enhancing the actual use effect. In addition, the overall structure of the mechanism is highly compact and stable, which is easy to install and arrange, and has a prolonged service life.

[0072] In some embodiments, Figure 6 As shown, in order to improve the structural stability and support strength, the inner guide member 2 also includes: two reinforcing plates 23, which are arranged on both sides of the limit plate 21, and the inner side of the reinforcing plate 23 is connected to the two adjacent support rods 22, and the front end is connected to the inner side of the front cover 11.

[0073] Specifically, the reinforcing plate 23 connects the two support rods 22 and is welded to the inner side of the front end cover 11, thereby dispersing the force exerted on the support rods 22 and avoiding deformation after long-term use, which would cause the limit plate 21 to be offset and the pull rod 7 to tilt, thereby ensuring the use effect and improving the impact resistance.

[0074] In some embodiments, Figure 3 and Figure 7 As shown, the front end cover 11 , the rear end cover 12 and the pressing plate 4 are all circular and concentrically arranged; the pressing plate 4 is provided with a plurality of first through holes 41 adapted to the outer guide rods 3 .

[0075] The above design further improves the structural compactness of the mechanism, thereby reducing the overall volume, facilitating the installation and arrangement of the mechanism, and achieving good practical use effects.

[0076] In some embodiments, Figure 3 to Figure 6 As shown, a first positioning ring 112 is provided on the front end cover 11 , a second positioning ring 42 is provided on the pressure plate 4 , one end of the elastic structure 5 is sleeved on the first positioning ring 112 , and the other end is sleeved on the second positioning ring 42 .

[0077] The above design radially limits the two ends of the elastic structure 5 through the first positioning ring 112 and the second positioning ring 42, which plays a positioning role, avoids the elastic structure 5 from being displaced during use, ensures the stability of the device, and reduces the failure rate.

[0078] In some embodiments, Figure 2 to Figure 5As shown, for the convenience of production and processing, the elastic structure 5 includes: a positioning ring 51, a first spring 52 and a second spring 53. The positioning ring 51 is an integrally formed part, including a circular tube 511 and a limiting ring 512, and the limiting ring 512 is sleeved on the outer circumferential surface of the circular tube 511. One end of the first spring 52 abuts against the inner side of the front end cover 11, and the other end is sleeved on the circular tube 511 and abuts against one side of the limiting ring 512. One end of the second spring 53 abuts against the inner side of the rear end cover 12, and the other end is sleeved on the circular tube 511 and abuts against the other side of the limiting ring 512.

[0079] The above design solves the problem of excessive length of the raw material by dividing a traditional whole spring into a first spring 52 and a second spring 53, thereby facilitating production and processing; and also facilitates concentric docking of the two springs by providing a positioning ring 51, thereby improving structural stability.

[0080] In some embodiments, Figure 4 As shown, in order to facilitate the tightness adjustment, the pressure plate 4 is provided with a second through hole 43 adapted to the pull rod 7 , and the pull rod 7 passes through the second through hole 43 and is threadedly connected with an adjusting nut 8 .

[0081] Specifically, rotating the adjusting nut 8 can drive the pressing plate 4 to move axially on the pull rod 7, thereby adjusting the degree of compression of the elastic structure 5. The operation is simple, the installation and adjustment are convenient, and the use effect is improved.

[0082] In some embodiments, Figure 2 to Figure 5 As shown, in order to improve the connection stability, it also includes: a hinge structure 9, which specifically includes a U-shaped member 91, a rotating shaft 92, two rolling bearings 93 and a sliding bearing 94.

[0083] Specifically, the U-shaped part 91 is threadedly connected to one end of the pull rod 7, which is convenient for production assembly and disassembly and maintenance; the two ends of the rotating shaft 92 pass through the two ends of the U-shaped part 91 respectively; two rolling bearings 93 are respectively arranged on both sides of the U-shaped part 91, and are sleeved on the rotating shaft 92, which significantly improves the smoothness of the rotation of the rotating shaft 92; the sliding bearing 94 is sleeved on the rotating shaft 92 and is located on the inner side of the U-shaped part 91, and one end of the pull plate 6 is sleeved on the sliding bearing 94.

[0084] Specifically, the pull plate 6 is rotatably connected to the rotating shaft 92 through a sliding bearing 94, and the rotating shaft 92 is rotatably connected to the U-shaped part 91 through rolling bearings 93 at both ends, thereby improving the smoothness of the constant force spring support hanger movement, making it less likely to get stuck, and greatly improving the stability.

[0085] The embodiment of the present application also discloses a constant force spring support hanger, including the above-mentioned constant force mechanism.

[0086] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A constant force mechanism, characterized in that: include: The cylinder (1) comprises: The front end cover (11) is provided with a movable passage (111). rear end cover (12), A cylinder shell (13) is arranged between the front end cover (11) and the rear end cover (12); The inner guide member (2) is located inside the cylinder (1) and comprises: The limiting plate (21) is provided with an inner guide hole (211). Four support rods (22) are arranged in a rectangular shape and are disposed between the limiting plate (21) and the front end cover (11); A plurality of external guide rods (3) are located in the cylinder shell (13) and are arranged between the front end cover (11) and the rear end cover (12); A pressure plate (4) slidably connected to the plurality of outer guide rods (3); An elastic structure (5) is supported between the pressure plate (4) and the front end cover (11) and is movably mounted outside the inner guide member (2), and a plurality of outer guide rods (3) are evenly arranged around the elastic structure (5); A pulling plate (6), one end of which passes through the movable channel (111) to extend into the cylinder (1); A pull rod (7) has one end connected to the pressure plate (4) and the other end passing through the inner guide hole (211) and then hinged to the pull plate (6).

2. The constant force mechanism according to claim 1, characterized in that: The inner guide member (2) further comprises: Two reinforcing plates (23) are arranged on both sides of the limiting plate (21), and the inner sides of the reinforcing plates (23) are connected to two adjacent support rods (22), and the front ends are connected to the inner sides of the front end cover (11).

3. The constant force mechanism according to claim 1, characterized in that: The front end cover (11), the rear end cover (12) and the pressing plate (4) are all circular and concentrically arranged; The pressing plate (4) is provided with a plurality of first through holes (41) adapted to the outer guide rods (3).

4. The constant force mechanism according to claim 1, characterized in that: The front end cover (11) is provided with a first positioning ring (112), the pressure plate (4) is provided with a second positioning ring (42), one end of the elastic structure (5) is sleeved on the first positioning ring (112), and the other end is sleeved on the second positioning ring (42).

5. The constant force mechanism according to claim 1, characterized in that: The elastic structure (5) comprises: The positioning ring (51) is an integrally formed part, comprising A circular tube (511), A limiting ring (512) is sleeved on the outer peripheral surface of the circular tube (511); A first spring (52), one end of which is in contact with the inner side of the front end cover (11), and the other end of which is sleeved on the circular tube (511) and in contact with one side of the limiting ring (512); The second spring (53) has one end abutting against the inner side of the rear end cover (12), and the other end sleeved on the circular tube (511) and abutting against the other side of the limiting ring (512).

6. The constant force mechanism according to claim 1, characterized in that: The pressure plate (4) is provided with a second through hole (43) adapted to the pull rod (7), and the pull rod (7) is threadedly connected with an adjusting nut (8) after passing through the second through hole (43).

7. The constant force mechanism according to claim 1, characterized in that: Also includes: The hinge structure (9) comprises The U-shaped member (91) is threadedly connected to one end of the pull rod (7). The two ends of the rotating shaft (92) pass through the two ends of the U-shaped member (9) respectively. Two rolling bearings (93) are respectively arranged on both sides of the U-shaped member (9) and sleeved on the rotating shaft (92). A sliding bearing (94) is sleeved on the rotating shaft (92) and is located inside the U-shaped member (9), and one end of the pulling plate (6) is sleeved on the sliding bearing (94).

8. A constant force spring hanger, characterized in that: Comprising the constant force mechanism as described in any one of claims 1 to 7.

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